I wanna ask a question about HP Laserjet 4345MFP I hope you will give me Idea to fix it I have Error message 51.10 I just wanna know what that error stand for and how can I solve it Greatly appreciate your solution. I'll really gratefull to you, thank you

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HP Laserjet 4345MFPBacklight on printer display does not light.Counts up the 256MB memory then HP logo (3 sizes) appears (just visible)The 3 lights keep cycling on the display. Thats it, does nothing else.It has been left overnight and continues to display the logo and cycling 3 lights.Rear DC Cont Fan is turning. No other fans or activity with machine.When ADF/scanner/mfp or hard disk are disconnected it does recognise this and throws an error and asks for reboot.I have tried cold reset, nvram init. and hard disk init. but no difference.Your thoughts?

Ensure that you have the error message correctly written down, then go to the HP Web Site and ask them about this error, specifically in conjunction with that specific printer or all-in-one device. HP can help you find out why you are having problems.

This a link to a 4345 service manual. Fuser is in removal and replacement/user replaceable parts. A 50.2 is the fuser is not warming up to temp. A replacement may ne needed. If the fuser was just replaced you would want to check this pdf
www.lbrty.com/tech/ta4xxx.pdf

This is from the service manual and should help you
determine if you need to call in for service. If is in warranty I would
anyways since the fuser would be covered if at fault.

58.04 ERROR To continue turn off then on. The low-voltage power supply has experienced an error.1. Reinstall the fuser. Check the connector(J1901) between the fuser and product.Replace the cable or fixing unit if theconnector is damaged.2. Reconnect the connectors of the fusercontrol PCA (J303, J305) and the DCcontroller PCA (J107).3. Replace the fuser. See Fuseron page 191.